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(No Mode.;

T. A. KUGHLER sa J. Gon/ms.

HYDRAULIC `PRESSUlB PUMP.

' Patented May 31, 1898..

UNrrnn Sfrn'rns THOMAS AnKUGHiER AND JOSEPH GOMES, OF NEW YORK, N. Y.

HYnRAuL/icj-PRESSURE Pur/1P.

SFECIFICATION forming part of Letters Patent No. 604,767, dated May 31,1898. Application filed November 25, 1895. Serial No. 570,149. (Nomodel.)

To @Z whom it may concern.- v I Be it known that we, THOMAS A. 'KUGHLERv and JOSEPH GOMES, citizens of the United States, and residents of NewYork city, in the county of New York and State of New York,

haveinvented certain new and useful Im? yprovements inHydraulic-Pressure Pumps, of

which the following is a specification, reference being had'to theaccompanying4 drawings, forming a part thereof, in which similar lettersof reference indicate corresponding parts. l

- This invention relates to hydraulic pumps, and particularly to thatclass thereof which are designed for use in connection/'With elevators;and the object of the invention is to provide a pump in which both airand water aredrawn into the same cylinder and together Vforced into apressure-tank such as is usually employed in connection'with hydraulicelelvators. V

1 The invention is fully disclosed in the following specification, ofwhich the accompanying drawings form a part, in which- Figurel is a planView of our improved pump, the cylinder thereof and other ,parts beingshown in section; and Fig. 2, a top plan View thereof.

In the practice of our invention 4we provide a pump-cylinderA, which isin communication at eachend with pipes B at one side thereof and also ateachend with a pipe C on the opposite'side thereof, and the pipes B andC are arrangedparallel with .the cylinder A.,

We prefer to connect said pipes B together with a pipe G, which isconnected `with any suitable source of water-supply, and said pipes Bare each provided with check-valves vE, opening toward the cylinder A.We also prefer to connect said pipes C with a discharge-pipe H, bywhichthe air and water are conveyed to any suitable pressure-tank (notshown) as discharged from .said cylinder A, and said pipes C are eachprovided with check- Valves F, which open outward from said cylinder A.All'thesefeatures of construction are similar "to those'employed andform no part .of this invention, and will be easily understood by thosefamiliar with this class of de-v vices'and accustomed to the operationthereof. In'theconstruction of our invention we provide an air-pipe K,which communicates with pipe B. As theplunger M passes the middle of thesaid cylinder A in either direction air is drawn in and above the waterin said cyl inder through pipe K, the check-valve L opening to permitthe air to enter. On the return stroke of the plunger the water and airwill be forced out of that one of the outlet-pipes rC toward whichtlieplunger is moving, the

check-valve F on that outlet-pipe opening to permit the outliow of theair and water, while the aforesaid check-valve L closes to prevent theair and water from Workin g back through pipe K, and check-valve E onthat supply-pipe B toward which the plunger is moving closing to preventthe air and water from working back into the supply-pipe G,

Be it understood that the valves E are ordi-l nary check-valves and opento permit the water, which is-under no pressure, to enter the cylinder Aand close so as to prevent the backward iiow thereof, and the valves Fare similar in construction and open so as to permit the water andair-to be forced into pipe Il, but close so as to prevent their returnto the cylinder,'and the valve L in said pipe K is also adapted tooperate in the same inanner as the valves E and F.

By means of this apparatus we are enabled to force both Water and 'airinto'the pressuretank, (not shown,) and by means of this operation weare enabled to vmaintain .at all times the' desired amount'of pressurewithin said tank.

We do not linit ourselves to the exact form of apparatus herein shownand described, and we therefore reserve the right to make all suchalterations therein and modifications thereof as fairly come within thescope of our invention.

We do not limit our improved apparatus for where hydraulic pressure oruse in operating elevators. alone, as the same may be applied whereverhydraulic pumps or' wal-ter and air pressure are required.

Having fully described our invention, its construction and operation, Weclaim itas new andv We desire to secure our. rights b'y Letters Patentthereonl In a combined waterpump and air-coinpressor, thecombination-with the pump-cylinder of an air-inlet directly fromatmosphere to a point mid-ivayof the length of the "cylindervand abovethe' Water-level therein and A air-inlet openingl inward, an adjustablevalve on the saidl air-iulet outside of the said check-,V

adapted Ato forma layer of air above the water in said cylinder, acheck-valve on the said valve, a reciprocating plunger in said cylinderhaving a'periphery broader than said airopening inward, independentdischarge connections freni the ends of the cylinder, and check-valvesthereon opening outward, substantially as described.

In testimony that we claim the foregoing as our invention We have signedour names, in presence of. vthe subscribing witnesses,- this 21st day ofNovember, 1895.

THOMAS A. KUGHLER. JOSEPH GOMES.

Witnesses: 0. GEEST,

F. V. KIRCHHOFF.

